Diff: cmsis_dsp/TransformFunctions/arm_bitreversal2.S

Revision:

5:a912b042151f

Parent:

4:9cee975aadce

--- a/cmsis_dsp/TransformFunctions/arm_bitreversal2.S	Mon Jun 23 09:30:09 2014 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,148 +0,0 @@
-;/* ----------------------------------------------------------------------    
-;* Copyright (C) 2010-2013 ARM Limited. All rights reserved.    
-;*    
-;* $Date:        17. January 2013  
-;* $Revision: 	V1.4.1  
-;*    
-;* Project: 	    CMSIS DSP Library    
-;* Title:	    arm_bitreversal2.S   
-;*    
-;* Description:	This is the arm_bitreversal_32 function done in
-;*                assembly for maximum speed.  This function is called
-;*                after doing an fft to reorder the output.  The function
-;*                is loop unrolled by 2.
-;*    
-;* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
-;*  
-;* Redistribution and use in source and binary forms, with or without 
-;* modification, are permitted provided that the following conditions
-;* are met:
-;*   - Redistributions of source code must retain the above copyright
-;*     notice, this list of conditions and the following disclaimer.
-;*   - Redistributions in binary form must reproduce the above copyright
-;*     notice, this list of conditions and the following disclaimer in
-;*     the documentation and/or other materials provided with the 
-;*     distribution.
-;*   - Neither the name of ARM LIMITED nor the names of its contributors
-;*     may be used to endorse or promote products derived from this
-;*     software without specific prior written permission.
-;*
-;* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-;* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-;* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-;* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
-;* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-;* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-;* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-;* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-;* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-;* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-;* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-;* POSSIBILITY OF SUCH DAMAGE.   
-;* -------------------------------------------------------------------- */
-#if defined(__CC_ARM) //Keil
-	#define CODESECT AREA     ||.text||, CODE, READONLY, ALIGN=2
-	#define LABEL
-#elif defined(__IASMARM__) //IAR
-	#define CODESECT SECTION `.text`:CODE
-	#define PROC 
-	#define LABEL 
-	#define ENDP
-	#define EXPORT PUBLIC
-#elif defined (__GNUC__) //GCC
-	.syntax unified
-	.cpu cortex-m4
-	.fpu softvfp
-	#define THUMB .thumb
-	#define CODESECT .section text
-	#define EXPORT .global
-	#define PROC :
-	#define LABEL :
-	#define ENDP
-	#define END
-#endif
-
-	CODESECT
-	THUMB
-
-;/*    
-;* @brief  In-place bit reversal function.   
-;* @param[in, out] *pSrc        points to the in-place buffer of unknown 32-bit data type. 
-;* @param[in]      bitRevLen    bit reversal table length
-;* @param[in]      *pBitRevTab  points to bit reversal table.   
-;* @return none.   
-;*/
-	EXPORT arm_bitreversal_32
-   
-#if defined(ARM_MATH_CM0) || defined(ARM_MATH_CM0PLUS)
-
-arm_bitreversal_32 PROC
-	ADDS     r3,r1,#1
-	PUSH     {r4-r6}           
-	ADDS     r1,r2,#0          
-	LSRS     r3,r3,#1          
-arm_bitreversal_32_0 LABEL
-	LDRH     r2,[r1,#2]        
-	LDRH     r6,[r1,#0]    
-	ADD      r2,r0,r2   
-	ADD      r6,r0,r6   
-	LDR      r5,[r2,#0] 
-	LDR      r4,[r6,#0]
-	STR      r5,[r6,#0]
-	STR      r4,[r2,#0]    
-	LDR      r5,[r2,#4]        
-	LDR      r4,[r6,#4]       
-	STR      r5,[r6,#4]       
-	STR      r4,[r2,#4]        
-	ADDS     r1,r1,#4          
-	SUBS     r3,r3,#1          
-	BNE      arm_bitreversal_32_0
-	POP      {r4-r6}
-	BX       lr
-	ENDP
-
-#else
-
-arm_bitreversal_32 PROC
-	ADDS     r3,r1,#1
-	CMP      r3,#1
-	IT       LS
-	BXLS     lr
-	PUSH     {r4-r9}           
-	ADDS     r1,r2,#2          
-	LSRS     r3,r3,#2          
-arm_bitreversal_32_0 LABEL       ;/* loop unrolled by 2 */
-	LDRH     r8,[r1,#4]        
-	LDRH     r9,[r1,#2]  
-	LDRH     r2,[r1,#0]        
-	LDRH     r12,[r1,#-2]    
-	ADD      r8,r0,r8   
-	ADD      r9,r0,r9    
-	ADD      r2,r0,r2   
-	ADD      r12,r0,r12   
-	LDR      r7,[r9,#0] 
-	LDR      r6,[r8,#0]
-	LDR      r5,[r2,#0] 
-	LDR      r4,[r12,#0]
-	STR      r6,[r9,#0]
-	STR      r7,[r8,#0] 
-	STR      r5,[r12,#0]
-	STR      r4,[r2,#0]      
-	LDR      r7,[r9,#4]        
-	LDR      r6,[r8,#4] 
-	LDR      r5,[r2,#4]        
-	LDR      r4,[r12,#4]           
-	STR      r6,[r9,#4]       
-	STR      r7,[r8,#4]   
-	STR      r5,[r12,#4]       
-	STR      r4,[r2,#4]        
-	ADDS     r1,r1,#8          
-	SUBS     r3,r3,#1          
-	BNE      arm_bitreversal_32_0
-	POP      {r4-r9}
-	BX       lr
-	ENDP
-   
-#endif
-   
-	END